add /team/new and /team/[i:id] and /team/list #16

/team/new : create a new team thanks to a form. The team is directly saved in the database after some validations. Afterward the brand new team is displayed

/team/[i:id]: The action that displays a specific team thnaks to its id.

/team/list: This action currently list all team that are in the database because there's still no account yet. Once it'll be added then this action should list all team of the current user thanks to his id.

 class TeamController
 {
     private TeamModel $model;
     private Environment $twig;

     private const ROLE_COACH = 1;
     public const ROLE_PLAYER = 0;
     public const ROLE_COACH = 1;

         return $teams;
     }
     public function displayTeam(int $id): Team {

add /team/new and /team/[i:id] and /team/list #16

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